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45 lines
1.4 KiB
PHP
45 lines
1.4 KiB
PHP
;
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; C64 generic definitions. Stolen from Elite128
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;
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; ---------------------------------------------------------------------------
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; Zero page, Commodore stuff
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MEMSIZE = $34 ; Size of memory installed
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TIME = $8D ; 60HZ clock
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ST = $96 ; IEC status byte
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KEY_COUNT = $9E ; Number of keys in input buffer
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CURS_FLAG = $A7 ; 1 = cursor off
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CURS_BLINK = $A8 ; Blink counter
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CURS_CHAR = $A9 ; Character under the cursor
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CURS_STATE = $AA ; Cursor blink state
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SCREEN_PTR = $C4 ; Pointer to current char in text screen
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CURS_X = $C6 ; Cursor column
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FNLEN = $D1 ; Length of filename
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LFN = $D2 ; Current Logical File Number
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SECADR = $D3 ; Secondary address
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DEVNUM = $D4 ; Device number
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SCR_LINELEN = $D5 ; Screen line length
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CURS_Y = $D8 ; Cursor row
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FNADR = $DA ; Pointer to file name
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KEY_BUF = $26F ; Keyboard buffer
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;----------------------------------------------------------------------------
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; PET ROM type detection
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PET_DETECT = $FFFB
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PET_2000 = $CA
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PET_3000 = $FC
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PET_4000 = $FD
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;----------------------------------------------------------------------------
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; Vector and other locations
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IRQVec = $0090
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BRKVec = $0092
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NMIVec = $0094
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